Most adults have probably forgotten what it’s like to ride on a big, yellow school bus. That may be the only logical reason why almost 80% of children under the age of 10 answered the latest online riddle correctly. National Geographic has shown both kids and grown-ups an image of a yellow, school bus. The vehicle looks identical on both the left and right side. The brainteaser asks a simple question: will the bus move left or right? You can’t just guess the answer but give a rational explanation for your choice.